EP0372641A3 - Continuously transmitting and receiving radar - Google Patents

Continuously transmitting and receiving radar Download PDF

Info

Publication number
EP0372641A3
EP0372641A3 EP19890203056 EP89203056A EP0372641A3 EP 0372641 A3 EP0372641 A3 EP 0372641A3 EP 19890203056 EP19890203056 EP 19890203056 EP 89203056 A EP89203056 A EP 89203056A EP 0372641 A3 EP0372641 A3 EP 0372641A3
Authority
EP
European Patent Office
Prior art keywords
control
control vectors
signal
quadrature related
pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19890203056
Other languages
German (de)
French (fr)
Other versions
EP0372641A2 (en
Inventor
Brian John Minnis
Andrew Gerald Stove
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electronics UK Ltd
Koninklijke Philips NV
Original Assignee
Philips Electronic and Associated Industries Ltd
Philips Electronics UK Ltd
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Electronic and Associated Industries Ltd, Philips Electronics UK Ltd, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Electronic and Associated Industries Ltd
Publication of EP0372641A2 publication Critical patent/EP0372641A2/en
Publication of EP0372641A3 publication Critical patent/EP0372641A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • G01S7/038—Feedthrough nulling circuits

Abstract

A CW radar comprises a substantially continously operable transmitter (10) and receiver (16,18,20), signal operating means (12,14) for radiating the transmitter signal and for receiving at least the return signal and a reflected power canceller (RPC) circuit (26, 28 and 30) for cancelling leakage signals in a signal path from the signal operating means to the receiver. The receiver front end comprises quadrature related mixers (18,20) which supply intermediate frequency signals (I₁ and Q₁) to a low frequency control loop (32, 34, 36) which supplies at least a pair of control signals (Ic,Qc) to a four quadrant vector modulator (28) in the RPC circuit. In order to be able to optimise the cancellation of phase as well as amplitude, the control circuit loop includes means for synthesising control vectors (I₁, -I₁, Q₁ and -Q₁) from the outputs of the quadrature related mixers (18,20). Selecting means selects a pair of quadrature related control vectors from those control vectors synthesised on the basis of minimising leakage in the outputs of the quadrature related mixers (18,20). The selected control vectors (Ic,Qc) are applied to the four quadrant vector modulator (28) which preferably comprises a pair of analogue driven biphase modulators (56,58 - Figure 4 (not shown)). In an alternative embodiment (Figure 7) the four quadrant vector modulator comprises four voltage controlled attenuators to which respective control vectors (Ic, -Ic, Qc and -Qc).
EP19890203056 1988-12-07 1989-12-01 Continuously transmitting and receiving radar Withdrawn EP0372641A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8828561A GB2226204A (en) 1988-12-07 1988-12-07 Continuously transmitting and receiving radar
GB8828561 1988-12-07

Publications (2)

Publication Number Publication Date
EP0372641A2 EP0372641A2 (en) 1990-06-13
EP0372641A3 true EP0372641A3 (en) 1991-01-02

Family

ID=10648105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890203056 Withdrawn EP0372641A3 (en) 1988-12-07 1989-12-01 Continuously transmitting and receiving radar

Country Status (4)

Country Link
US (1) US4970519A (en)
EP (1) EP0372641A3 (en)
JP (1) JPH02189489A (en)
GB (1) GB2226204A (en)

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US5821897A (en) * 1996-12-20 1998-10-13 Wiltron Company Simulator for testing a collision avoidance radar system
US5918167A (en) * 1997-03-11 1999-06-29 Northern Telecom Limited Quadrature downconverter local oscillator leakage canceller
US6008760A (en) * 1997-05-23 1999-12-28 Genghis Comm Cancellation system for frequency reuse in microwave communications
US5920281A (en) * 1997-08-05 1999-07-06 Wiltron Company Radar test system for collision avoidance automotive radar
US5969667A (en) * 1997-10-16 1999-10-19 Automotive Systems Laboratory, Inc. Radar system
CA2271154A1 (en) * 1997-10-16 1999-04-22 Michael E. Farmer Radar system
US6192222B1 (en) * 1998-09-03 2001-02-20 Micron Technology, Inc. Backscatter communication systems, interrogators, methods of communicating in a backscatter system, and backscatter communication methods
US6356764B1 (en) * 1999-03-09 2002-03-12 Micron Technology, Inc. Wireless communication systems, interrogators and methods of communicating within a wireless communication system
US7592898B1 (en) * 1999-03-09 2009-09-22 Keystone Technology Solutions, Llc Wireless communication systems, interrogators and methods of communicating within a wireless communication system
US6603391B1 (en) * 1999-03-09 2003-08-05 Micron Technology, Inc. Phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator
DE19918767A1 (en) 1999-04-24 2000-10-26 Daimler Chrysler Ag Device for increasing the dynamic range of frequency-modulated continuous wave radars
US6411252B1 (en) * 1999-06-25 2002-06-25 Anritsu Company Narrow band millimeter wave VNA for testing automotive collision avoidance radar components
US6441783B1 (en) 1999-10-07 2002-08-27 Qinetiq Limited Circuit module for a phased array
DE10134386C1 (en) * 2001-07-14 2003-01-30 Eads Deutschland Gmbh Continuous wave radar with reflection modulator
DE10134345C1 (en) * 2001-07-14 2002-10-31 Eads Deutschland Gmbh Function tester for radar has sender switch and modulator to produce radar-echo signal matching test signal
ATE311629T1 (en) * 2003-02-21 2005-12-15 Cit Alcatel STEPLESS, PROGRAMMABLE CLOCK OFFSET CIRCUIT
US7369811B2 (en) * 2004-04-30 2008-05-06 Wj Communications, Inc. System and method for sensitivity optimization of RF receiver using adaptive nulling
EP1630713B1 (en) * 2004-08-24 2020-05-20 Sony Deutschland GmbH Backscatter interrogator reception method and interrogator for a modulated backscatter system
US20060098765A1 (en) * 2004-11-05 2006-05-11 Impinj, Inc. Interference cancellation in RFID systems
US7277725B1 (en) * 2004-11-30 2007-10-02 United States Of America As Represented By The Secretary Of The Navy Frequency agile-collocated multi-signal RF distribution system
US20060198429A1 (en) * 2005-03-02 2006-09-07 Microelectronics Technology Inc. Isolating circuit of transmitting and receiving paths in same frequency carrier
GB0515110D0 (en) * 2005-07-25 2005-08-31 Siemens Ag Interrogation system
US20070085727A1 (en) * 2005-10-19 2007-04-19 Honeywell International Inc. Methods and systems for leakage cancellation in radar equipped munitions
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KR100974540B1 (en) * 2008-02-18 2010-08-11 한국과학기술원 Quadrature radar apparatus
US7969350B2 (en) * 2008-06-06 2011-06-28 Honeywell International Inc. Method and system for reducing a leakage component of a received radar signal
US8866686B1 (en) 2009-03-25 2014-10-21 Raytheon Company Methods and apparatus for super-element phased array radiator
US9373888B1 (en) 2009-03-25 2016-06-21 Raytheon Company Method and apparatus for reducing sidelobes in large phased array radar with super-elements
US9086476B1 (en) 2009-03-25 2015-07-21 Raytheon Company Method and apparatus for rejecting intermodulation products
US8907842B1 (en) * 2009-03-25 2014-12-09 Raytheon Company Method and apparatus for attenuating a transmitted feedthrough signal
JP5527833B2 (en) * 2009-07-16 2014-06-25 フリースケール セミコンダクター インコーポレイテッド Integrated circuit, transceiver and computer readable storage element for leakage cancellation in a receive path
US9071337B2 (en) * 2010-02-17 2015-06-30 Saab Ab Wideband transmitter/receiver arrangement for multifunctional radar and communication
US9502022B2 (en) * 2010-09-02 2016-11-22 Spatial Digital Systems, Inc. Apparatus and method of generating quiet zone by cancellation-through-injection techniques
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JP5963573B2 (en) * 2012-06-29 2016-08-03 古野電気株式会社 Radar equipment
US9297885B2 (en) 2012-07-27 2016-03-29 Honeywell International Inc. Method of system compensation to reduce the effects of self interference in frequency modulated continuous wave altimeter systems
JP2016521363A (en) 2013-04-18 2016-07-21 カリフォルニア インスティチュート オブ テクノロジー Life detection radar
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WO2015090427A1 (en) * 2013-12-19 2015-06-25 Telefonaktiebolaget L M Ericsson (Publ) Load balancing of dual-polarized antennas
US9986934B2 (en) * 2014-01-29 2018-06-05 California Institute Of Technology Microwave radar sensor modules
EP2928139B1 (en) * 2014-03-31 2020-09-30 Mitsubishi Electric R&D Centre Europe B.V. Method and a device for cancelling a narrow band interference in a single carrier signal
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US4725842A (en) * 1982-09-27 1988-02-16 Teledyne Industries, Inc. Isolation apparatus for a continuous-wave radar system

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Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US3696429A (en) * 1971-05-24 1972-10-03 Cutler Hammer Inc Signal cancellation system
US4725842A (en) * 1982-09-27 1988-02-16 Teledyne Industries, Inc. Isolation apparatus for a continuous-wave radar system
US4520476A (en) * 1982-12-13 1985-05-28 Rockwell International Corporation Apparatus for enabling the duplex operation of a transmitter and receiver

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Also Published As

Publication number Publication date
GB2226204A (en) 1990-06-20
US4970519A (en) 1990-11-13
GB8828561D0 (en) 1989-01-11
JPH02189489A (en) 1990-07-25
EP0372641A2 (en) 1990-06-13

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